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A. Parsons, B. Collett, Janine Lewis (1984)
Changes in the structure and physiology of a perennial ryegrass sward when released from a continuous stocking management: implications for the use of exclusion cages in continuously stocked swardsGrass and Forage Science, 39
M. Jackson, T. Williams (1979)
Response of grass swards to fertilizer N under cutting or grazingThe Journal of Agricultural Science, 92
A. Parsons, E. Leafe, B. Collett, P. Penning, J. Lewis (1983)
The Physiology of Grass Production Under Grazing. II. Photosynthesis, Crop Growth and Animal Intake of Continuously-Grazed SwardsJournal of Applied Ecology, 20
M. Robson, G. Ryle, J. Woledge (1988)
The grass plant—its form and function
I. Johnson, J. Thornley (1987)
A Model of Shoot: Root Partitioning with Optimal GrowthAnnals of Botany, 60
I. Johnson, A. Parsons (1985)
A theoretical analysis of grass growth under grazingJournal of Theoretical Biology, 112
A. Parsons, E. Leafe, B. Collett, W. Stiles (1983)
The Physiology of Grass Production Under Grazing. I. Characteristics of Leaf and Canopy Photosynthesis of Continuously-Grazed SwardsJournal of Applied Ecology, 20
Alberda Alberda, Sibma Sibma (1968)
Dry matter production and light interception of crop surfaces. 3. Actual herbage production in different years as compared with potential valuesJournal of the British Grassland Society, 23
I. Johnson, J. Thornley (1985)
Dynamic model of the response of a vegetative grass crop to light, temperature and nitrogenPlant Cell and Environment, 8
Wilson Wilson, Catchpoole Catchpoole, Weir Weir (1986)
Stimulation of growth and nitrogen uptake by shading a rundown green panic pasture on Brigalow clay soilTropical grasslands, 20
A. Parsons (1988)
The effects of season and management on the growth of grass swards
J. Woledge, P. Pearse (1985)
The effect of nitrogenous fertilizer on the photosynthesis of leaves of a ryegrass swardGrass and Forage Science, 40
I. Johnson, J. Thornley (1984)
A model of instantaneous and daily canopy photosynthesisJournal of Theoretical Biology, 107
H. Parnas (1975)
Model for decomposition of organic material by microorganismsSoil Biology & Biochemistry, 7
Ryden Ryden (1984)
The flow of nitrogen in grasslandProceeding of The Fertiliser Society (London), 229
T. Alberda, L. Sibma (1968)
Dry matter production and light interception of crop surfacesGrass and Forage Science, 23
Abstract. The model comprises three submodels, which together give an integrated picture of nitrogen pools and fluxes in grassland under grazing or cutting. The first submodel represents the interaction of the grazing animal with the sward through intake and the production of excreta: the second is concerned with the growth of the vegetative grass crop and its response to light, temperature and nitrogen; these two submodels are interfaced with a submodel of soil carbon and nitrogen pools and processes, including dead shoot and root material, dead and live soil organic matter, and three pools representing mineral nitrogen. No account is taken of water, which is assumed to be non‐limiting, or the possible effects of soil pH and soil aeration. The model is used to simulate a range of management strategies as applied to stocking density and fertilizer application, examining both steady‐state and non‐steady‐state conditions. The model highlights the long time scales associated with grassland systems, the role of the grazing animal in modifying carbon and nitrogen flows, and the importance of soil conditions to grassland productivity and fertilizer response. The productivity of grazed swards may be greater or less than that of cut swards depending on stocking density and fertilizer application, although nitrogen recovery (as calculated here) is always lower in grazed swards. The model is able to stimulate mineralization and immobilization, and place these in the context of plant processes and the grazing animal.
Plant Cell & Environment – Wiley
Published: Dec 1, 1989
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